someone help me.. after i upgrading bios on 4752 acer.. my laptop wont boot up.. just a blank screen, and power LED ..when i google it, some user got problem like me.. they say the bios need to flash using usb.. but there are file to be needed to flash that bios via usb.. also must rename file that contain .FD files.. but i dont know where the file is it.. there nothing in this website (Acer driver) .. it just contain .wph file.. please help me..
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